As provided in ORC 124.23C, any person who has completed service in the uniformed services, who have been honorably discharged from the uniformed services or transferred to the reserve with evidence of satisfactory service, and who is an Ohio resident and any member of a reserve component of the armed forces of the United States, including the Ohio National Guard, who has completed more than 180 days of active duty service pursuant to an executive order of the President of the United States or an act of Congress of the United States may file with the director a certificate of service or honorable discharge (DD-214 - Long version), and upon this filing, the person shall receive an additional credit of twenty percent (20%) of the person's total grade given in the examination in which the person receives a passing grade. Identifies and investigates non-filers and delinquent filers through all available sources including, but not limited to, questionnaires, U.S. Postal Service records, the income tax master file, City tax hard copy records, the State of Ohio income tax master file, rental applications, code violations, building permits, vendors licenses, community and economic development programs, anonymous tips notices from other tax departments, and employer W-3 reconciliations.